| Literature DB >> 30890589 |
K Kitazato1, R E Milliken2, T Iwata3,4, M Abe3,4, M Ohtake3,4, S Matsuura5, T Arai8, Y Nakauchi3, T Nakamura7, M Matsuoka3, H Senshu8, N Hirata27, T Hiroi2, C Pilorget10, R Brunetto10, F Poulet10, L Riu3, J-P Bibring10, D Takir11, D L Domingue12, F Vilas12, M A Barucci13, D Perna14,13, E Palomba15, A Galiano15, K Tsumura7,16, T Osawa17, M Komatsu4, A Nakato3, T Arai8, N Takato18,4, T Matsunaga19, Y Takagi20, K Matsumoto18,4, T Kouyama21, Y Yokota3,22, E Tatsumi23, N Sakatani3, Y Yamamoto3,4, T Okada3,23, S Sugita23, R Honda22, T Morota24, S Kameda25, H Sawada3, C Honda9, M Yamada8, H Suzuki26, K Yoshioka23, M Hayakawa3, K Ogawa27, Y Cho23, K Shirai3, Y Shimaki3, N Hirata27, A Yamaguchi28,4, N Ogawa3, F Terui3, T Yamaguchi29, Y Takei3, T Saiki3, S Nakazawa3, S Tanaka3,4, M Yoshikawa3,4, S Watanabe24,3, Y Tsuda3,4.
Abstract
The near-Earth asteroid 162173 Ryugu, the target of the Hayabusa2 sample-return mission, is thought to be a primitive carbonaceous object. We report reflectance spectra of Ryugu's surface acquired with the Near-Infrared Spectrometer (NIRS3) on Hayabusa2, to provide direct measurements of the surface composition and geological context for the returned samples. A weak, narrow absorption feature centered at 2.72 micrometers was detected across the entire observed surface, indicating that hydroxyl (OH)-bearing minerals are ubiquitous there. The intensity of the OH feature and low albedo are similar to thermally and/or shock-metamorphosed carbonaceous chondrite meteorites. There are few variations in the OH-band position, which is consistent with Ryugu being a compositionally homogeneous rubble-pile object generated from impact fragments of an undifferentiated aqueously altered parent body.Entities:
Year: 2019 PMID： 30890589 DOI： 10.1126/science.aav7432
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728